$sValue[abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789 `+-=~!@#^$%^^&*()_ []{}<>^;:'",./? àáâãä叿çèéêëìíîïðñòóôõö÷øùúûüýþÿ ÀÁÂÃÄŨÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖרÙÚÛÜÝÞß]
Origin:
=^taint[html][$sValue]=

$sEscapeValued[^sValue.escape[]] Escaped:
=^taint[html][$sEscapeValued]=

$sUnescapedValue[^string:unescape[$sEscapeValued]] Unescaped [^if($sUnescapedValue eq $sValue){equal to source}{NOT equal to source}]:
=^taint[html][$sUnescapedValue]=

Empty string escape/unescape: $v[] $s[$v]
=^s.escape[]=
=^string:unescape[$s]=